The transcription factor CaBBX10 promotes chlorophyll and carotenoid pigment accumulation in Capsicum annuum fruit
文献类型： 外文期刊
作者： Wang, Jin 1 ; Shan, Qingyun 1 ; Yuan, Qiaoling 1 ; Pan, Luzhao 1 ; Wang, Meiqi 1 ; Zhao, Pei 1 ; Yu, Feng 2 ; Dai, Li 1 ; Xie, Lingling 3 ; Wang, Zhongyi 1 ; Dai, Xiongze 1 ; Chen, Li 3 ; Zou, Xuexiao 1 ; Xiong, Cheng 1 ; Zhu, Fan 1 ; Liu, Feng 1 ;
作者机构： 1.Hunan Agr Univ, Coll Hort, Engn Res Ctr Germplasm Innovat & New Varieties Bre, Key Lab Vegetable Biol Hunan Prov, Changsha 410128, Peoples R China
2.Hunan Univ, Coll Biol, State Key Lab Chemo Biosensing & Chemometr, Hunan Key Lab Plant Funct Genom & Dev Regulat, Changsha 410082, Peoples R China
3.Hunan Acad Agr Sci, Hunan Vegetable Res Inst, Changsha 410000, Peoples R China
期刊名称：PLANT PHYSIOLOGY （ 影响因子：6.9； 五年影响因子：7.7 ）
ISSN： 0032-0889
年卷期： 2024 年 197 卷 2 期
页码：
收录情况： SCI
摘要： Chlorophylls and carotenoids are 2 pivotal photosynthetic pigments directly influencing the economic value of pepper ( Capsicum annuum L.) fruits. However, the coordinated regulatory mechanisms governing the accumulation of both chlorophylls and carotenoids during pepper fruit development remain elusive. In this study, pepper B-box 10 ( CaBBX10 ), a candidate hub transcription factor, was found to play dual roles in the early development of pepper fruit. CaBBX10 virus-induced gene silencing and overexpression experiments demonstrated that the encoded transcription factor promotes both chlorophyll and carotenoid accumulation in pepper fruit. Further comprehensive analyses showed that CaBBX10 directly binds to the promoter of magnesium chelatase subunit D subunit ( CaCHLD ) and phytoene synthase 1 ( CaPSY1 ), thereby activating their expression in the chlorophyll and carotenoid biosynthesis pathways, respectively. Additionally, the photomorphogenic factor CaCOP1 was found to physically interact with CaBBX10 and lead to its degradation. Therefore, CaBBX10 may serve as a critical link connecting chlorophyll and carotenoid biosynthesis to light signaling. Altogether, our findings reveal a mechanism for the complex transcriptional regulation that simultaneously promotes chlorophyll and carotenoid accumulation in pepper fruit.
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